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Consider an electromagnet, as shown in Figure, which is used to support a solid piece of steel and is excited by a coil of N = 1000 turns carrying a current i = 1.5 A. The cross-sectional area of the fixed magnetic core is A = 0.01 m2 . Assume magnetic linearity, infinite permeability of the magnetic structure, and negligible fringing in the air gap.
(a) Develop a general expression for the force f acting to pull the bar toward the fixed magnetic core, in terms of the stored energy, from the basic principle of conservation of energy.
(b) Determine the force that is required to support the weight from falling for x = 1.5 mm.
Let the message signal m(t) = α cos (2πf m t) be used to either frequency-modulate or phase- modulate the carrier Ac cos(2πf c t). Find the modulated signal in each case.
Find a minimum two level, multiple-output AND-OR gate circuit to realize these functions (eight gates minimum). F 1 (a,b,c,d) =Σm(10,11,12,15) +D (4,8,14) F 2 (a,b,c,d) =Σm(4
Q. A practical current source is represented by an ideal current source of 200 mA along with a shunt internal source resistance of 12 k. Determine the percentage drop in load curr
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Plug and Socket Condition : In the same way that your knowledge of flexes and fuses is wasted if you don't care to ensure that flexes and cables are routed safely and sensibly, so
1. The rejection criteria of an investment project, as evaluated from the NPV method is that NPV should be equal to zero. 2. Technical feasibility is the only criteria to dete
(a) Design a 2 nd order Sallen and Key low pass active filter with the following characteristics: Nominal Cut-off Frequency: 1.6 kHz Variable Gain: 0 to 7.5 dB You may a
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